265640661366004 has 48 divisors (see below), whose sum is σ = 489663969822720. Its totient is φ = 125745989747040.

The previous prime is 265640661365971. The next prime is 265640661366007. The reversal of 265640661366004 is 400663166046562.

It is a super-2 number, since 2×265640661366004² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265640661366007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3121799499 + ... + 3121884589.

It is an arithmetic number, because the mean of its divisors is an integer number (10201332704640).

Almost surely, 2^{265640661366004} is an apocalyptic number.

It is an amenable number.

265640661366004 is a deficient number, since it is larger than the sum of its proper divisors (224023308456716).

265640661366004 is a wasteful number, since it uses less digits than its factorization.

265640661366004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111988 (or 111986 counting only the distinct ones).

The product of its (nonzero) digits is 22394880, while the sum is 55.

The spelling of 265640661366004 in words is "two hundred sixty-five trillion, six hundred forty billion, six hundred sixty-one million, three hundred sixty-six thousand, four".